The 1987 Mexican production titled Quinceañera was a telenovela.
A telenovela is a serialized television drama, usually produced in episodes that tell a continuing story over a limited run. The Mexican Quinceañera starred Adela Noriega as Maricruz Fernández and Thalía as Beatriz Villanueva. It aired from 1987 to 1988.
The plot uses adolescence, romance, friendship, family pressure, and social differences to build its drama around two young women. Its title links the series to the cultural importance of the fifteenth birthday, but the program is fictional entertainment rather than a documentary about the ceremony.
The classification matters because Quinceañera is also the title of a 2006 independent film. That later production is a feature drama directed by Richard Glatzer and Wash Westmoreland, not a telenovela. Specifying the year prevents the two works from being mixed up.